phy: Move ULPI phy header out of drivers to include path

Although ULPI phy is currently being used by tusb1210,
there can be other consumers too in future. So move this
to the includes path for phy.

Signed-off-by: Vivek Gautam <[e-mail]>
Cc: Stephen Boyd <[e-mail]>
Cc: Heikki Krogerus <[e-mail]>
Cc: Kishon Vijay Abraham I <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Acked-by: Heikki Krogerus <[e-mail]>
Signed-off-by: Kishon Vijay Abraham I <[e-mail]>

drivers/phy/phy-tusb1210.c

···
 #include <linux/module.h>
 #include <linux/ulpi/driver.h>
 #include <linux/gpio/consumer.h>
-
-#include "ulpi_phy.h"
+#include <linux/phy/ulpi_phy.h>
 
 #define TUSB1210_VENDOR_SPECIFIC2		0x80
 #define TUSB1210_VENDOR_SPECIFIC2_IHSTX_SHIFT	0